Phase Transformations and Tellurium Recovery from Technical Copper Telluride by Oxidative-Distillate Roasting at 0.67 kPa
This paper presents the results of a study of phase transformations occurring in copper-telluride by-products during its processing of oxidation-distillate roasting at low pressure. The results show that copper telluride is oxidized through intermediate compounds to the most stable tellurate (Cu<...
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MDPI AG
2022-10-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/12/10/1774 |
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| author | Alina Nitsenko Xeniya Linnik Valeriy Volodin Farkhat Tuleutay Nurila Burabaeva Sergey Trebukhov Galiya Ruzakhunova |
| author_facet | Alina Nitsenko Xeniya Linnik Valeriy Volodin Farkhat Tuleutay Nurila Burabaeva Sergey Trebukhov Galiya Ruzakhunova |
| author_sort | Alina Nitsenko |
| collection | DOAJ |
| description | This paper presents the results of a study of phase transformations occurring in copper-telluride by-products during its processing of oxidation-distillate roasting at low pressure. The results show that copper telluride is oxidized through intermediate compounds to the most stable tellurate (Cu<sub>3</sub>TeO<sub>6</sub>) at low temperatures. The increase in the roasting temperature above 900 °C and the presence of an oxidizer favor the copper orthotellurate decomposition. Thus, the tellurium extraction rate is 90–93% at a temperature of 1000 °C, the oxidant flow rate is 2.2 × 10<sup>−2</sup> m<sup>3</sup>/m<sup>2</sup>·s, and the roasting time is 60–90 min. One of the decomposition products is copper oxide alloy, which is the basis of the residue. The second product is tellurium in oxide form, which evaporates and then condenses in the cold zone of the condenser in crystalline form. The main constituent phase of the condensate is tellurium oxide (TeO<sub>2</sub>), which can be further processed during one operation to elemental chalcogen by thermal reduction or electrolytic method. |
| first_indexed | 2024-03-09T19:47:39Z |
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| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-09T19:47:39Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
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| series | Metals |
| spelling | doaj.art-cbee2e212e60476ba581747d53af64bb2023-11-24T01:20:32ZengMDPI AGMetals2075-47012022-10-011210177410.3390/met12101774Phase Transformations and Tellurium Recovery from Technical Copper Telluride by Oxidative-Distillate Roasting at 0.67 kPaAlina Nitsenko0Xeniya Linnik1Valeriy Volodin2Farkhat Tuleutay3Nurila Burabaeva4Sergey Trebukhov5Galiya Ruzakhunova6Institute of Metallurgy and Ore Beneficiation JSC, Satbayev University, Almaty 050010, KazakhstanInstitute of Metallurgy and Ore Beneficiation JSC, Satbayev University, Almaty 050010, KazakhstanInstitute of Metallurgy and Ore Beneficiation JSC, Satbayev University, Almaty 050010, KazakhstanInstitute of Metallurgy and Ore Beneficiation JSC, Satbayev University, Almaty 050010, KazakhstanInstitute of Metallurgy and Ore Beneficiation JSC, Satbayev University, Almaty 050010, KazakhstanInstitute of Metallurgy and Ore Beneficiation JSC, Satbayev University, Almaty 050010, KazakhstanInstitute of Metallurgy and Ore Beneficiation JSC, Satbayev University, Almaty 050010, KazakhstanThis paper presents the results of a study of phase transformations occurring in copper-telluride by-products during its processing of oxidation-distillate roasting at low pressure. The results show that copper telluride is oxidized through intermediate compounds to the most stable tellurate (Cu<sub>3</sub>TeO<sub>6</sub>) at low temperatures. The increase in the roasting temperature above 900 °C and the presence of an oxidizer favor the copper orthotellurate decomposition. Thus, the tellurium extraction rate is 90–93% at a temperature of 1000 °C, the oxidant flow rate is 2.2 × 10<sup>−2</sup> m<sup>3</sup>/m<sup>2</sup>·s, and the roasting time is 60–90 min. One of the decomposition products is copper oxide alloy, which is the basis of the residue. The second product is tellurium in oxide form, which evaporates and then condenses in the cold zone of the condenser in crystalline form. The main constituent phase of the condensate is tellurium oxide (TeO<sub>2</sub>), which can be further processed during one operation to elemental chalcogen by thermal reduction or electrolytic method.https://www.mdpi.com/2075-4701/12/10/1774recoverytelluriumcopper telluridedistillationroastingphase composition |
| spellingShingle | Alina Nitsenko Xeniya Linnik Valeriy Volodin Farkhat Tuleutay Nurila Burabaeva Sergey Trebukhov Galiya Ruzakhunova Phase Transformations and Tellurium Recovery from Technical Copper Telluride by Oxidative-Distillate Roasting at 0.67 kPa Metals recovery tellurium copper telluride distillation roasting phase composition |
| title | Phase Transformations and Tellurium Recovery from Technical Copper Telluride by Oxidative-Distillate Roasting at 0.67 kPa |
| title_full | Phase Transformations and Tellurium Recovery from Technical Copper Telluride by Oxidative-Distillate Roasting at 0.67 kPa |
| title_fullStr | Phase Transformations and Tellurium Recovery from Technical Copper Telluride by Oxidative-Distillate Roasting at 0.67 kPa |
| title_full_unstemmed | Phase Transformations and Tellurium Recovery from Technical Copper Telluride by Oxidative-Distillate Roasting at 0.67 kPa |
| title_short | Phase Transformations and Tellurium Recovery from Technical Copper Telluride by Oxidative-Distillate Roasting at 0.67 kPa |
| title_sort | phase transformations and tellurium recovery from technical copper telluride by oxidative distillate roasting at 0 67 kpa |
| topic | recovery tellurium copper telluride distillation roasting phase composition |
| url | https://www.mdpi.com/2075-4701/12/10/1774 |
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